A Wrist and chest monitor is the technology that keeps track of heart rate during a workout. Thus, the correct option is C.
What is Technology?
Technology may be characterized as the implementation of scientific understanding for the practical aims of human life.
A wrist and chest monitor allows its sensors to read fluctuations in the rate of blood flow under the skin and estimate your heart rate. It is also utilized in the measurement of blood oxygen levels.
Therefore, the correct option for this question is C.
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